IPv4 Subnet Cheat Sheet


CIDR # of IPv4 Ips Number of /24s
/8 (Class A) 16,777,216  
/9 8,388,608  
/10 4,194,304  
/11 2,097,152  
/12 1,048,576  
/13 524,288  
/14 262,144  
/15 131,072  
/16 (Class B) 65,536 256
/17 32,768 128
/18 16,384 64
/19 9,182 32
/20 4,092 16
/21 2,048 8
/22 1,024 4
/23 512 2
/24 256  
/25 128  
/26 64  
/27 32  
/28 16  
/29 8  
/30 4  
/31 2  

Products & Services

Domain Registration

© 2016 BlazingSwitch. All Rights Reserved.